Malicious PDF — malware analysis report

Static analysis result for SHA-256 e403790a3c920c93…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 20:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 129226d4f7eb662b1135e558f3f5b2b2 SHA-1: d47fe2995e595abdccafd39c5aa022f7389eeeab SHA-256: e403790a3c920c93c8e33c12ddf4dacc984465c6d52f88644242e472fd2e9af6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bold+textview+android+studio, which is likely used to redirect users to a final malicious payload. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bold+textview+android+studio
    • http://files.lashthetics.shop/uploads/1/3/0/8/130814666/5dc60fe9610d.pdf
    • http://ribefu.allamericanarabians.com/uploads/1/3/1/6/131606349/17dc8f553.pdf
    • http://files.vca1988.org/uploads/1/3/0/7/130776619/munesijomufajawakiso.pdf
    • http://files.paterpaulus.us/uploads/1/3/0/8/130874366/bakis.pdf
    • http://zuzej.davidstrailendurancerun.com/uploads/1/3/0/8/130814328/difaberus_filixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/git_untrack_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/tavebazegabejofufulede.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/jimetobozufu.pdf
    • https://cdn.shopify.com/s/files/1/0450/4007/4910/files/kalnirnay_2020_marathi_calendar_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/mezosimoxewasibunasakudiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4030/7362/files/sigma_aldrich_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0936/files/read_the_very_hungry_caterpillar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0445/7473/6543/files/after_we_fell_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/72258284719.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/vejiwajafipurodebaset.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/mevefugizererutoxa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f58.bin
6d784b53bba37b304dc7b32f98a626c7e1f85c558d589ce886679d839d148d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 4968 bytes
font_01_sfnt_off0000705f.bin
b9c3e3b83aab459e9fb4b49c27b30f1d37a6fe09760661e58b65d0e96e7004ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705F 14508 bytes
font_02_sfnt_off00009e40.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E40 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.